The presence of hormones produced by the _________ _________ after implantation prevent menstruation.
Fill in the blank(s) with the appropriate word(s)
Answer: corpus ; luteum
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A deletion of a particular stretch of chromosome 15 can cause either Prader-Willi syndrome or Angelman syndrome, depending on
A. the parental origin of the normal and deleted chromosome. B. whether or not the region is methylated properly. C. whether a translocation event has occurred. D. whether a nondisjunction event has occurred.
The genetic makeup of an organism is its
a. phenotype. b. genotype. c. locus. d. gamete.
What type of mutation is seen here? Wild type: 5?-TAC AAA ATA CAG CGG-3? Mutation: 5?-TAC AAG ATA CAG CGG-3?
A) transition B) transversion C) insertion D) deletion E) nonsense
A trait in which the heterozygotes have a phenotype that is intermediate between the dominant and recessive phenotypes is an indication of
a. codominance. b. pleiotropy. c. a sex-linked trait. d. incomplete dominance. e. None of these are correct.